j840.com - robtex.com
j840.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 60.199.243.209🇹🇼 TFN-NET60.199.243.0/24 Taiwan Fixed Network | ||||||
| PTR | 60-199-243-209.static.tfn.net.tw | ||||||
| NS | dns1.f1.com.tw ⭐ ⚠️ Not in parent delegation | ||||||
| A | 218.32.213.234🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp234.f1.com.tw | ||||||
| NS | dns2.f1.com.tw ⚠️ Not in parent delegation | ||||||
| A | 220.228.6.17🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| NS | sf243.f1.com.tw ⚠️ Not in zone NS records | ||||||
| A | 220.228.6.17🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| NS | sp234.f1.com.tw ⚠️ Not in zone NS records | ||||||
| A | 218.32.213.234🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp234.f1.com.tw | ||||||
| MX | j840.com ⭐ | ||||||
| A | 60.199.243.209🇹🇼 TFN-NET60.199.243.0/24 Taiwan Fixed Network | ||||||
| PTR | 60-199-243-209.static.tfn.net.tw | ||||||
| MX | www.j840.com(14) | ||||||
| A | 60.199.243.209🇹🇼 TFN-NET60.199.243.0/24 Taiwan Fixed Network | ||||||
| PTR | 60-199-243-209.static.tfn.net.tw | ||||||
| SOA | dns1.f1.com.twohgo@ms23.hinet.net 2000-11-01 #8 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774374827 | ||||||
MX for
j840.com |
Subdomains
www.j840.com |
Same first word
j840.com |
Similar names
DNS History
7 records (7 active, 0 former)
●NSsf243.f1.com.tw2026-03-24 → 2026-03-24 · 3 obs
● 2026-03-24 06:32:02
● 2026-03-24 18:06:12
●NSsp234.f1.com.tw2026-03-24 → 2026-03-24 · 3 obs
● 2026-03-24 06:32:02
● 2026-03-24 18:06:12
●MXj840.com2015-05-19 → 2026-03-24 · 2 obs
● 2026-03-24 18:06:12
●MXwww.j840.com2015-05-19 → 2026-03-24 · 2 obs
● 2026-03-24 18:06:12
●A60.199.243.2092015-05-19 → 2026-03-24 · 2 obs
● 2026-03-24 18:06:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| j840.com | sf243.f1.com.tw, sp234.f1.com.tw | - |
✅ Authoritative Response
Server:220.228.6.17
NS records: sf243.f1.com.tw, sp234.f1.com.tw
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for j840.com (unsigned zone)
⏱️ Timing
Total: 1433ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 60.199.243.209 |
| NS | 2 | dns2.f1.com.tw, dns1.f1.com.tw |
| MX | 2 | www.j840.com (pri: 14), j840.com (pri: 10) |
| SOA | 1 | dns1.f1.com.tw ohgo.ms23.hinet.net |
Analysis
Hierarchy
The parent of www.j840.com is j840.com.
Mail Server Role
j840.com serves as the mail server for j840.com.
www.j840.com commonly serves as a mail server along with j840.com.
IP Addresses
j840.com points to an IP address: 60.199.243.209.
other host names include live-854.com, www.momo-135.com, www.ut-391.com, meme-483.com and www.s267.com; they share IP numbers with j840.com.
Name Servers
j840.com delegates to four name servers: dns1.f1.com.tw, dns2.f1.com.tw, sf243.f1.com.tw and sp234.f1.com.tw.
j840.com at least partially shares name servers with other domains, for instance mtv987.com, ut-playgirl.com, truesource.com.tw, hi1007.com and 176hi.info.
These name servers are commonly used with the following: ns1.icstock.com.tw, ns2.icstock.com.tw, ns1.oknet.tw and ns2.oknet.tw.
Host names with one IP number:
dns1.f1.com.tw points to 218.32.213.234
dns2.f1.com.tw points to 220.228.6.17
sf243.f1.com.tw points to 220.228.6.17
sp234.f1.com.tw points to 218.32.213.234
Host names that map to 218.32.213.234: dns1.f1.com.tw and sp234.f1.com.tw
Host names that map to 220.228.6.17: dns2.f1.com.tw and sf243.f1.com.tw
Mail Servers
Two mail servers handle j840.com: j840.com and www.j840.com.
Host names with a single IP
j840.com points to 60.199.243.209
www.j840.com points to 60.199.243.209
Host names that point to 60.199.243.209: j840.com and www.j840.com